CAUTIONï Install or remove modules from the shelf only when the power is off.If you install a module in the shelf with the power on, the internalcircuitry may suffer damage and the product warranty will be void.ï Remove and install circuit boards only in a static-safe environment(use antistatic wrist straps, smocks, footwear, etc.).ï Keep circuit boards in their antistatic bags when they are not in use.ï Do not ship or store circuit boards near strong electrostatic, electromag-netic, magnetic, or radioactive fields.ï For more complete information on electrostatic discharge safetyprecautions, refer to BellcoreTM Technical Reference #†TR-NWT-000870.Copyright 1998 by Dantel, Inc. • Dantel is a registered trademark of Dantel, Inc. • ISO 9001 RegisteredPrinted in the U.S.A.INSTALLATION & OPERATION MANUAL05547-0798 <90-00047>D18-05547-XXDTSS3A O RDERW IRE /D ATAI NTERFACEAbout this Practice:This practice has been reissued to:• Update Figs. 2, 4-6, 16, & 20.Issue date: July 1998Reissued Practices: Updated andnew content can be identified by abanner in the right margin.UPDATEDTable of ContentsOrdering Information ........................................................................... 2General Description .............................................................................. 2Application Information ....................................................................... 3Installation ............................................................................................ 5Operation ............................................................................................ 23Warranty ............................................................................................. 26